高精度多波束激光雷达时间间隔并行测量技术研究

基于延迟线内插原理，设计了一种基于FPGA的多路时间间隔并行 测量方法。该方法可以解决多波束激光雷达的同时测量问题，其通道可达52波束。本文系统主要由 脉冲整形电路、测量电路以及数据处理模块等组成。实验结果表明，各通道的综合 测时均方差范围为59.55～70.06 ps，各通道平均值的均匀性为446.8 ps，一致性误 差较小。由于具有性能稳定、精度高、体积小以及使用方便等优点，该系统可以为高精度多通道信息获取技 术在多波束机载激光雷达中的广泛应用提供技术基础。

Research on High Precision Time Interval Parallel Measuring Technology of Multi-channel Lidar

A multi-channel time interval parallel measuring method based on FPGA is designed on the basis of the principle of delay line interpolation. This method can be used to solve the parallel measuring problem of a multi-channel lidar with up to 52 channels. The system in this paper mainly consists of a pulse shaping circuit, a measuring circuit and a data processing module etc. The experimental results show that the average variance of each channel is in the range 59.55 ps to 70.66 ps. The uniformity of each channel''s average value is 446.8 ps. The consistency error is small. Because of the advantages of stability, high precision, small volume and easy use, the system can provide technical basis for the wide application of high precision multi-channel information acquisition technology in airborne multi-beam lidars.